Some letters have English equivalents, but many of the letters use different symbols and are in a different order.
I've printed the image under 'Greek alphabet - Modern pronunciation' on this site:
and keep it with me to practise the order of the alphabet.
I also play this over and over to get the pronunciation.
Practise reciting the names of the letters and their sounds as well as writing them.
Recognise and also practise hand-written letters as these can look quite different the type.